You can burn wood pellets in the corn burners also. 
I have had a St.croix corn stove for 4 years now and LOVE IT.  
http://www.stcroixheat.com/Last week I replaced the exhaust fan motor ($120), otherwise it has been no problem.  They also have a great fuel calculator on their web site: 
http://www.stcroixheat.com/fuel.phpThe corn/pellet FURNACE, however; has been a headache.  I started out with a Countryside 7500. 
http://www.americanenergysystems.com/magnum7500.cfm  It has a "stirrer" in the fire pot.  The stirrator wears out in 1-2 years and you need to replace it ($30).  It is very touchy to moisture content and air flow, chiminey needs to be cleaned out every year.  (If I had it to do over again I would have gone with the 6500, no stirrator and now with the redesigned fire pot it works great.)
This year I got a Fahrenheit: 
http://www.fahrenheittech.com/index.htmlAt times it has been worse than the Countryside and at times it is great!
If I ever get a cabin I will be getting a Clarry Stove or a Sedore Stove.  No electricity needed!
http://clarrypelletstove.com/http://www.sedoreusa.com/howitworks.html   This thing is really interesting.....!
Penn State lists most of the corn and pellet stoves available (pictures on right side): 
http://energy.cas.psu.edu/shellcorn.htmlThey also have a fuel calculator: 
http://energy.cas.psu.edu/EnergySelector.htmlCouple other things to consider...
(1)  Corn and pellet storage.  I use about 150 bushels of corn in my home it suppliments the LP (LP only on the cold days).  A gravity grain wagon makes hauling and buying corn easy.  5 gallon buckets from the barn to the house.  
In the basement of my office I built a storage bin out of 4x8 plywood, 2x4s, tin and cable.  I had an access hole cut into the sidewalk and hung an electric auger from the floor joists.  That way I can dump corn on my sidewalk with the gravity wagon and turn on the auger.  No pails required!  I then use a "flex auger" to deliver the corn from the box to my furnace.  I just flip a swich and the corn drops into the furnace hopper!
(2)  Cleaning/screening corn.
Some corn stove/furnace models are more touchy to "dirty" corn.  You can build a screener with tin, and wire mesh and wood.  Or buy one.  Some farmers corn is cleaner than others, same with moisture content.
In closing I would strongly suggest you have a dealer close by that is willing to help with the problems that will arise, unless it has no moving parts or electronics!